Positive-working lithographic printing plate

US8993213B2 · kind B2 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Celin Savariar-Hauck · Badenhausen, DE
• Gerhard Hauck · Badenhausen, DE

Key dates

• Filing date: Jul 12, 2013
• Grant date: Mar 31, 2015
• Expiry date: Jul 12, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/322
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Positive-working lithographic printing plate precursors have an inner layer that includes a polymeric binder having an acid number of at least 30 mg KOH/g of polymer to and including 150 mg KOH/g of polymer, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl(alkyl)acrylamides or alkoxymethyl(alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano groups. The use of such polymeric binders in the inner layer provides good bakeability and chemical solvent resistance. Such positive-working lithographic printing plate precursors also include an outer layer disposed over the inner layer, which outer layer comprises an infrared radiation absorbing compound.